JP2020097481A - Straight advance feeder and combination weighing device equipped with the same - Google Patents

Abstract

To provide a straight advance feeder capable of smoothly conveying small amounts of articles that tend to stick to each other.SOLUTION: A guide protrusion 22 whose lateral width gradually increases as proceeding in a conveying direction, is provided in a middle of passage width on a bottom of a conveyance passage in a trough 19a formed in a gutter shape, and narrow width conveyance passages h arranged to gradually decreases the passage width, are formed on both sides beside the guide protrusion 22. Preferably, the guide protrusion 22 is gradually raised as proceeding in the conveying direction.SELECTED DRAWING: Figure 9

Description

The present invention relates to a rectilinear feeder that vibrates and conveys articles such as various foods and confectioneries, and a combination weighing device including the rectilinear feeder, and more specifically, a rectilinear feeder suitable for vibrating and conveying a small amount of articles. And a combination weighing device suitable for mixing and weighing small amounts of various types of articles.

As a combination weighing device suitable for mixing and weighing a wide variety of products, for example, as disclosed in Patent Document 1, a large number of weighing units and a plurality of linear feeders corresponding thereto are arranged in parallel laterally. Then, it is known that the articles stored in the storage hopper are down-flow-supplied to the starting end portion of the straight advance feeder, and the articles vibrated and conveyed by each straight advance feeder are supplied to the corresponding weighing unit.

JP, 2008-77074, A

For example, articles such as small fish miso-boiled tend to stick to each other to form a lump, and it is difficult to convey the pieces little by little to a weighing unit. For example, when mixing and weighing a snack set that mixes 1 or 2 small fish mirin with nuts, hail, bean confectionery, etc., it is difficult to convey a small amount of small fish with a straight feeder, There is a case where the small fish cannot be supplied to the weighing unit at all, or conversely, the small fish is supplied to the weighing unit excessively. Therefore, in order to secure a weighing hopper to which a small amount of small fish is supplied, it is necessary to take measures such as increasing the number of straight-line feeders and weighing units allocated for small fish.

The present invention has been made paying attention to such a point, and it is possible to perform straight line feeders that can smoothly convey articles that are likely to stick to each other little by little, and to perform mixing and weighing using the straight line feeders. An object of the present invention is to provide a combination weighing device that can be used.

In order to achieve the above object, the present invention has the following configuration.

(1) A straight feeder according to the present invention is a straight feeder that vibrates a trough to convey an article on the trough.
A guide projection that gradually increases in the width direction toward the conveyance direction of the article is provided at the bottom of the conveyance path of the article in the trough, in the middle of the conveyance path in the width direction, and both sides of the guide projection are provided. A transport passage is formed in which the width of the passage is gradually narrowed.

According to the present invention, an article that sticks to each other and tends to form a lump is gradually unraveled and distributed to both sides in the trough width direction by the guide protrusion while being vibrated and conveyed, and the passage width on both sides of the guide protrusion is gradually reduced. It is sorted and conveyed little by little through the. As a result, even articles that easily stick to each other can be smoothly conveyed little by little. (2) In a preferred embodiment of the present invention, the guide protrusion is provided on the downstream side of the article in the conveyance direction, and The ridge is gradually raised in the conveying direction.

According to this embodiment, the articles that are likely to be lumps that are vibrated and conveyed are dislodged while riding on the guide protrusions, distributed to the narrow conveyance passages on both sides in the trough width direction, and discharged little by little from the downstream side of the trough. ..

(3) In another embodiment of the present invention, two troughs, that is, an upstream side trough and a downstream side trough in the transport direction are provided, and the two troughs form a step-down step toward the transport direction. The upstream troughs are arranged in tandem, and have the guide passages and the conveying passages whose passage widths are gradually narrowed.

According to this embodiment, in the upstream trough located in the upper stage, the guide projections sort the articles conveyed in small amounts in the width direction of the trough and transfer them to the downstream trough located in the lower stage with a drop. It is possible to separate articles that tend to become lumps due to the drop impact caused by the drop.

(4) In still another embodiment of the present invention, a vibrating mechanism that vibrates and drives the two troughs independently of each other is provided.

According to this embodiment, it is possible to perform vibration drive in each of the upstream and downstream troughs in accordance with the transportation condition, and it is possible to transport an article that easily sticks while being appropriately unraveled.

(5) A combination weighing device according to the present invention includes a plurality of straight-line feeders according to any of (1) to (4) above.

According to the present invention, articles that are likely to stick to each other can be smoothly conveyed by the linear feeder of the present invention, and the combination weighing can be suitably performed.

(6) In a preferred embodiment of the present invention, a plurality of linear feeders are arranged in a line in a straight line, and a supply hopper to which the articles conveyed by each linear feeder are supplied and an article discharged from the supply hopper. A plurality of series of weighing units having a series of upper and lower weighing hoppers for holding and weighing the weight are arranged in a line in a straight line.

According to this embodiment, a plurality of series of weighing units having a series of a supply hopper and a weighing hopper are arranged in a line in a straight line, and a plurality of linear feeders for supplying articles to each supply hopper are linear. Since it is arranged in a line, when it is desired to increase the number of stations forming a plurality of stations of the weighing unit, for example, when the articles to be fed to the feeding hopper are of various types, a linear shape can be used. The weighing units and the linear feeders arranged in a line may be added in a straight line, which is compact in plan view.

As described above, according to the straight-line feeder of the present invention, articles that are likely to stick to each other can be smoothly conveyed little by little, and according to the combination weighing device of the present invention, articles that easily stick to each other can be provided. The combined weighing including can be suitably implemented.

FIG. 1 is a schematic side view of a combination weighing device according to an embodiment of the present invention. FIG. 2 is a schematic plan view of the combination weighing device of FIG. FIG. 3 is a schematic front view of one of the weighing devices of FIG. FIG. 4 is a schematic front view of the other weighing device of FIG. 1. FIG. 5 is a side view of the main part of the weighing device. FIG. 6 is a side view of essential parts of the weighing device in a rejecting operation state. FIG. 7 shows a straight-advanced feeder of standard specifications, (a) is a plan view, and (b) is a side view with a part cut vertically. FIG. 8 shows a straight-advanced feeder of another specification, (a) is a plan view, and (b) is a vertical side view. FIG. 9 is a perspective view showing a straight feeder of another specification. FIG. 10 is an exploded perspective view of the tank structure. FIG. 11 is a side view showing a mounting procedure of the tank structure. FIG. 12 is a schematic perspective view showing the belt conveyor and the article dispersion guide unit. FIG. 13 is a schematic plan view of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic side view of a combination weighing device according to an embodiment of the present invention, FIG. 2 is a schematic plan view thereof, and FIGS. 3 and 4 are schematic front views of the weighing device.
The combination weighing device of this embodiment is a device for combining and weighing various kinds (for example, 8 kinds) of various foods, confectionery, and the like in predetermined small amounts, and for example, nuts, hail, bean confectionery, etc. It is suitable for a case where a snack set consisting of one or two small fish is mixed and weighed.

The combination weighing device is installed on the first floor surface F1 and is used in a packaging line for putting the weighed articles into a packaging device (not shown) installed below the floor surface to pack the articles.

In order to facilitate understanding of the structure, in the following description, the lateral direction in FIGS. 1 and 2, the front-back direction on the paper in FIGS. 3 and 4 and the front-back direction on the paper in FIG. The horizontal direction in FIGS. 3 and 4 is referred to as the left-right direction.

As shown in FIG. 1, this combination weighing device has a structure in which a pair of front and rear weighing devices 1A and 1B are arranged face-to-face with a center passage R through which a worker can move left and right sandwiched. .. The weighing devices 1A and 1B are basically configured to have the same specifications, and the detailed structure of the weighing devices 1A and 1B will be described below.

Inside of each of the weighing devices 1A and 1B (on the side of the central passage R), two bases 3 are horizontally installed at a predetermined height position via a support underframe 2 erected on the first floor surface F1. On the outer side of the base body 3 (on the side opposite to the central passage R), a plurality of weighing units 4 are installed in a line in the left and right. In this example, each weighing device 1A, 1B is equipped with a row of twelve weighing units 4, and 24 weighing units 4 for both weighing devices 1A, 1B perform mixed combination weighing of various types of articles. It is like this.

Further, an article supply unit 5 that supplies various kinds of articles to be weighed to the upper portion of each weighing unit 4 is provided further outside the group of weighing units 4.

As shown in FIG. 5, the weighing unit 4 is basically the same as the conventional one, and includes a supply hopper 6 having an openable/closable gate that receives an article conveyed from the article supply section 5, temporarily stores and discharges the article. A weighing hopper 7 having an openable/closable gate for storing the articles discharged from the supply hopper 6, measuring the weight of the articles, and discharging the articles; and receiving and temporarily storing the articles weighed and discharged by the weighing hopper 7. And a memory hopper 8 having a freely openable and closable gate.

The supply hopper 6, the weighing hopper 7, and the memory hopper 8 are detachably supported on the base body 3, and a gate driving mechanism for these hoppers 6, 7, and 8 and a weight sensor for weighing the weighing hopper 6 are provided. It is accommodated in the base body 3.

As shown by the phantom lines in FIG. 2, each base 3 is supported on the upper part of the support frame 2 so as to be pivotally rotatable about a vertical fulcrum p at the lateral end, so that the hoppers can be removed and maintained. At this time, the base body 3 is pivotally rotated to the side of the central passage R to expose the weighing unit 4 group to a large extent so that the hoppers can be easily attached/detached and maintained.

As shown in FIG. 5, the lower end of the weighing hopper 7 is provided with an outer gate 7a and an inner gate 7b that can be independently opened and closed, and weighs by swinging and opening only the outer gate 7a. The articles are delivered directly to the first collecting chute 9 below through the first delivery path (a), and only the inner gate 7b is swingably opened, so that the weighed articles are delivered through the second delivery path (b). It is sent to the memory hopper 8 and temporarily stored.

Since each weighing unit 4 is provided with the memory hopper 8, the number of hoppers (effective hoppers) that can participate in the combination calculation can be increased.

Below the weighing hopper 7 and the memory hopper 8, a plurality of weighing hoppers 7 selected by a combination calculation so as to have a predetermined weight, or a first set of four collecting the articles dropped and delivered from the memory hopper 8. While the chutes 9 are arranged in a line in the left and right, two first sets for temporarily receiving and storing the articles collected by the first collecting chutes 9 below the first collecting chutes 9 for every two adjacent chutes 9. A hopper 10 is provided. Further, below the first collecting gates 10, second collecting chutes 11 for collecting the articles dropped and discharged from the respective first collecting gates 10 by sliding guides and twelve measuring units 4 are collected and collected. One second collecting hopper 12 is provided for each of the weighing devices 1A and 1B to collect and temporarily store the collected articles in one place.

Further, as shown in FIG. 1, below the central passage R, a final collecting hopper 13 for collecting the articles discharged from the second collecting hopper 12 provided for each of the weighing devices 1A and 1B in one place is installed. The final collecting hopper 13 is controlled to open and close based on a supply request command from the packaging device side. A metal detector 14 is provided in the article flow-down guide path from the second collecting hopper 12 to the final collecting hopper 13 to monitor the mixing of metallic foreign matters.

The article supply unit 5 is provided with a storage tank 15 that stores articles and a storage hopper 16 that is continuously provided at the lower ends of the storage tanks 15, and the articles that are fed from the lower end of the storage hopper 16 are provided in twelve stations. Twelve linear feeders 17 that vibrate and transfer toward the weighing unit 4 are arranged in parallel on the left and right above a support base 18.

The storage tank 15 includes a lower tank 15a that is dropped and supported in an opening of a second floor F2 that is installed further above the first floor F1, and a middle tank 15b and an upper tank that are removably positioned and supported thereon. The storage hopper 16 is composed of a tank 15c, and is detachably supported at the lower end of the lower tank 15a as described later.

The straight-moving feeder 17 has an upstream straight-moving feeder 17a on the upstream side in the conveying direction of articles and a downstream straight-moving feeder 17b on the downstream side arranged in a row in a step-down manner toward the conveying direction, that is, the upstream straight-moving feeder 17a is In the upper stage, the downstream linear feeders 17b are arranged in a column so as to be located in the lower stage. Each of the linear feeders 17a and 17b includes trough-shaped troughs 19a and 19b, and vibrating mechanisms 20a and 20b installed on the upper portion of the support base 18, and the troughs 19a and 19b include the vibrating mechanisms 20a and 19b. It is detachably connected to the vibrating head portion 20b.

The articles thrown into and supplied from the storage hopper 16 to the upstream linear feeder 17a are unwound while being vibrated and conveyed, transferred to the downstream linear feeder 17b, and sent to the supply hopper 6 of the weighing unit 4 little by little from the end of the downstream linear feeder 17b. Be done.
Above the rectilinear feeder 17, article sensors 21a and 21b that detect the stacking height of articles near the start end and the end of the downstream rectilinear feeder 17b, for example, with a laser are provided, respectively, and are added based on the detection information. The shaking mechanisms 20a and 20b are drive-controlled so that the articles are uniformly conveyed in each of the linear feeders 17.

Next, a structure for detachably connecting and supporting the storage hopper 16 to the lower end of the lower tank 15a in the storage tank 15 will be described. As shown in FIG. 10, at the lower end of the lower tank 15a, a hopper support portion 25 that is slightly larger than the opening at the lower end of the tank is provided. A pair of left and right support rails 26, which are bent inwardly toward each other, are provided on the left and right sides of the hopper support portion 25 so as to face each other at a predetermined interval.

On the other hand, a flange 27 extends from a rectangular inlet formed at the upper end of the storage hopper 16, and this flange 27 can be inserted into and removed from the support rail 26 of the hopper support part 25 from the rear side (the side opposite to the central passage R). Has become. In addition, a laterally long first stopper 28 that receives the front end side of the inserted flange 27 is bent at the inner end of the hopper support portion 25 (on the side of the central passage R), and the left and right support rails 26 are provided. A second short stopper 29, which receives the left and right end portions of the rear end side of the inserted flange 27, is bent upright at the outer (opposite side of the central passage R) end portion.

Further, on the outer side of the hopper support portion 25, a hopper regulation portion 30 that prevents the supported storage hopper 16 from rising is bent downward. The distance between the lower end of the hopper restricting portion 30 and the upper end of the second stopper 29 is set to a size that allows the flange 27 to pass through.

Therefore, as shown in FIG. 11, when connecting the storage hopper 16 to the lower tank 15a, first, the storage hopper 16 is brought close to the hopper support portion 25 in an inclined posture in which the flange 27 of the storage hopper 16 is slightly lowered. It is inserted into the support rail 26 so as to pass through the space between the lower end of the hopper restricting portion 30 and the upper end of the outer stopper 29.

When the front end side of the flange 27 comes into contact with the first stopper 28 and further insertion is blocked, the rear end side of the flange 27 has passed the second stopper 29 forward. Here, the storage hopper 16 is returned to the horizontal posture, and the left and right end sides of the flange 27 are dropped onto the support rails 26 and placed, so that the front and rear end sides of the flange 27 form the first stopper 28 and the second stopper 29. It is positioned so that it cannot move back and forth. As a result, the storage hopper 16 is suspended and supported in a posture of being positioned in the front, rear, left, and right with respect to the lower tank 15a.

When removing the storage hopper 16 supported by the support rails 26, the rear portion of the storage hopper 16 is slightly lifted to move the rear end side of the flange 27 above the second stopper 29, and the storage hopper 16 is continuously moved outward. It can be removed from the lower tank 16a by pulling it out.

In this way, the storage hopper 16 can be easily attached to and detached from the support rail 26 without using a tool, and since the storage hopper 16 has a simple form including the flange 27, it can be washed. Work such as is also easy.

Furthermore, since the storage hopper 16 is suspended and supported by the lower tank 15a, it is not necessary to provide a frame or the like for supporting the storage hopper 16, and the frame or the like may be an obstacle when the storage hopper 16 is attached or detached. Absent.

As described above, the lower tank 15a is dropped into and supported by the opening of the second floor surface F2, the middle tank 15b is placed in the lower tank 15a, the upper tank 15c is placed in the middle tank 15b, and the lower tank 15a is placed by the uneven portion. Since they are supported, these tanks 15a to 15c can also be easily attached/detached without using tools, and operations such as cleaning can be easily performed.

As shown in FIGS. 5 and 10, a transparent window 31 is provided on the side surface of the upper and lower intermediate portions of the storage hopper 16, and the storage condition of the articles can be monitored through the transparent window 31. In addition, a slide shutter 32 is provided in the upper and lower intermediate portions of the storage hopper 16, and the opening area of the lower end of the hopper is adjusted by adjusting the slide shutter 32, and the downward delivery is performed at the opening degree according to the type of the article. be able to. Further, if the lower end of the hopper is fully closed, the storage hopper 16 can be removed even when the articles remain in the storage hopper 16.

The tank configuration and the feeder configuration described above are standard specifications for supplying articles that do not stick to each other such as nuts, bean confectionery, hail, and the like, and include, for example, small fish mirin and small light rice crackers. A part of the straight-line feeders 17 that convey articles that are likely to stick to each other little by little and the storage tank 15 corresponding thereto are configured to have different specifications. In this example, as shown in FIG. 2 to FIG. 4, among the 12 straight feeders 17 arranged in parallel in the left-right direction, four straight feeders 17 (C) on the lateral one end side and a storage tank corresponding thereto are provided. 15(C) is another specification different from the standard specification, and its configuration will be described below.

In the storage tank 15 (C) of another specification, a wide belt conveyor 35 is used in order to smoothly deliver the articles that are difficult to flow down by its own weight. The belt conveyor 35 is arranged so as to horizontally rotate along the lower portion of the rectangular tubular upper tank 36. By rotationally driving the belt conveyor 35, the articles stored in the upper tank 36 are forcibly conveyed from the bottom of the article, widely dropped and delivered, and fed into the storage hopper 16 through the lower tank 15a.

In this example, the storage tank 15(C) of the one weighing device 1A and the storage tank 15(C) of the other weighing device 1B are installed in different postures. That is, in the storage tank 15(C) of the one weighing device 1A, the belt conveyor 35 is rotated in the front-rear direction parallel to the conveyance direction of the articles of the linear feeder 17, while the other weighing device 1B is rotated. In the storage tank 15(C), the belt conveyor 35 is configured to rotate in the left-right direction orthogonal to the article conveying direction of the straight-line feeder 17.

The articles dropped and discharged from the end of the belt conveyor 35 are guided to the storage hopper 16 via the lower tank 15a, but as shown in FIG. 4, in the storage tank 15(C) of the other weighing device 1B. Items that have been widely sent back and forth from the end of the belt conveyor 35 are carried out to the lower tank 15a. The four linear feeders 17(C) are arranged side by side in the left-right direction, whereas the belt conveyor 35 carries articles widely in the front-rear direction, which is the width direction of the belt conveyor 35.

Therefore, if an article carried out from the belt conveyor 35 is dropped and supplied directly as it is, two of the four linear feeders 17 (C) arranged in the left-right direction are closer to the center, and the two linear feeders 17 are located closer to the center. While a large amount of articles is supplied to (C), a small number of articles is supplied to each of the single straight feeders 17 (C) at the left and right ends. Since each linear feeder 17(C) supplies a small amount of articles to each supply hopper 6, the amount of articles supplied from the belt conveyor 35 to the starting end portion of each linear feeder 17(C) is as described above. If it is biased, the amount of articles supplied to the supply hopper 6 will be excessive, or conversely, the articles will not be supplied.

As described above, in order to prevent the articles from being supplied from the belt conveyor 35 to the laterally biased positions of the lower tank 15a, the lower tank 15a is provided with a pair of dispersion funnels 38 inside the article dispersion guide section. 37 is stored. In the article distribution guide portion 37, as shown in FIG. 4, the articles discharged from the belt conveyor 35 are moved by the pair of dispersion funnels 38 in the left-right direction which is the arrangement direction of the four linear feeders 17(C). Guide downflow to distribute.

FIG. 12 is a schematic perspective view showing the belt conveyor 35 and the article dispersion guide unit 37, and FIG. 13 is a schematic plan view thereof.

The two distribution funnels 38 are arranged adjacent to each other along the width direction (front-back direction) of the belt conveyor 35, and the boundaries of the rectangular upper ends of both dispersion funnels 38 are located at the center of the belt conveyor 35 in the width direction. It is arranged to.

Each of the dispersion funnels 38 is formed such that a circular lower end outlet 38a is deviated from a rectangular upper end inlet, and the lower end outlets 38a of two dispersion funnels 38 arranged in parallel have four straight feeders. They are arranged so as to be separated from each other in the left-right direction, which is the arrangement direction of 17(C), that is, the conveyance direction of the belt conveyor 35.

Therefore, the articles widely dropped and discharged in the belt width direction (front-rear direction) from the end of the belt conveyor 35 to the upper part of the lower tank 15a are arranged in the direction in which the linear feeders 17(C) are arranged by the downward guide of the two dispersion funnels 38. It is distributed in a certain left-right direction and dispersed, and the four straight-line feeders 17 (C) are dispersed and introduced into the start ends of the four linear feeders 17 (C) with little deviation.

FIG. 7 shows a straight-advanced feeder 17 of standard specifications, and FIGS. 8 and 9 show a straight-advanced feeder 17 (C) having different specifications.

Here, the detailed structure of the straight-advance feeder 17 (C) of another specification, which is suitable for small-quantity conveyance of articles that easily stick to each other such as small fish mirin and small and light rice crackers, will be described.

The trough 19a of the upstream linear feeder 17a in the linear feeder 17(C) of another specification shown in FIGS. 8 and 9 is formed in a gutter shape having an inverted trapezoidal cross-sectional shape. In this trough 19a, a conveyance path for conveying an article is constituted by a bottom surface and both side surfaces forming an inverted trapezoid, and an intermediate portion in the width direction (left-right direction) of the conveyance passage on the downstream side of the conveyance direction of the article, in this example. Then, in the center, a guide protrusion 22 for projecting the article in a distributed manner to both sides in the width direction is provided.

The guide protrusion 22 is formed in a long and narrow triangular shape before and after the planar shape thereof is gradually widened in the carrying direction, and the side shape thereof is a mountain shape which gradually rises linearly from the trough bottom surface in the carrying direction. Has been formed. The guide protrusion 22 has a protruding curved surface that is located at the center of the left and right and has long peaks that are smoothly curved in the front and rear.

Due to the guide protrusions 22, a transport passage h is formed on both sides thereof, the width of which gradually narrows in the transport direction. The lateral width of the transport passage h at the end of the guide protrusion 22 is preferably, for example, a width that allows a few small fish to pass through.

The trough 19b of the downstream linear feeder 17b in the linear feeder 17(C) of another specification is formed in a trough shape with an inverted trapezoidal cross section having a bottom surface that is gradually bent downward in the conveying direction of the article. In addition, the lowermost transport passage f located on the transport end side is formed to have a width small enough to transport a target article in one row, for example, one small fish in a row.

The straight-line feeder 17(C) of another specification is configured as described above, and the articles supplied to the upstream straight-line feeder 17a are conveyed forward while being vibrated and distributed by the guide projections 22 to the left and right, In this state, it is sent to the next downstream linear feeder 17b. In this case, when the articles that stick to each other and easily form a lump reach the guide projection 22, the article on the guide projection 22 is vibrated to be solved, and the articles are dispersed to the left and right of the guide projection 22 and are conveyed in a narrow width. A small amount of articles are conveyed through the passage h.

The articles transferred from the upstream linear feeder 17a to the downstream linear feeder 17b receive an appropriate drop impact at the step portion between the two feeders 17a and 17b, whereby the articles are separated and easily separated into individual articles. .. Further, the articles conveyed by the downstream linear feeder 17b drop and move through the two steps d, and are unraveled to reach the narrowest conveyance path f at the most downstream side. In the transport path f on the most downstream side, the articles are transported while being arranged in a line, and can be sent to the supply hopper 6 of the weighing unit 4 by a very small amount, for example, one small fish.

As described above, according to the present embodiment, the guide protrusions 22 of the trough 19a of the upstream linear feeder 17a can vibrate and convey an article, such as a small fish, which tends to form a lump in the trough width direction. It can be gradually divided and distributed to both sides, and can be conveyed and conveyed little by little through a conveyance passage in which the passage widths on both sides of the guide projection gradually become narrow.

Further, the drop impact when transferring from the trough 19a of the upstream linear feeder 17a to the trough 19b of the downstream linear feeder 17b allows the articles that tend to be lumps to be separated and smoothly conveyed little by little, and the downstream linear feeder 17b. It is possible to carry out a very small amount of articles from the trough 19b, for example, one small fish to the supply hopper 6 of the weighing unit 4.

As shown in FIG. 5, the support table 18 of the article supply unit 5 is provided with a reject mechanism 50 for discharging the articles excessively supplied to the weighing hopper 6.

The reject mechanism 50 is equipped with a reject chute 51 that can move forward and backward in the horizontal direction, a recovery chute 52 that recovers the articles introduced into the reject chute 51, and a recovery container 53.

The reject chute 51 is provided so as to face the first delivery path (a) of the weighing hopper 7 from the outside on the front side, and is driven forward and backward by an air cylinder 54. In normal times, as shown in FIG. 5, the reject chute 51 is retracted outside the first delivery path (a), and the articles are discharged to the first collecting chute 9 when the outer gate 7a of the weighing hopper 7 is opened. Does not interfere.

When the weight value weighed by the weighing hopper 7 is unsuitable for the combination calculation, the reject chute 51 enters the first delivery path (a) in the reject state, as shown in FIG. In this state, the outer gate 7a of the weighing hopper 7 is opened, whereby the articles in the weighing hopper 7 are discharged to the reject chute 51, and the excessive amount of articles is flowed down and collected into the collection container 53 via the collection chute 52. It When the collection is completed, the reject chute 51 is moved to the original position retracted from the first delivery path (a), and the outer gate 7a of the weighing hopper 7 is closed to prepare for the next weighing.

A guide member 55 made of a plate material is provided at the tip of the reject chute 51. The guide member 55 is located at a position facing the first delivery path (a) from the outside when the reject chute 51 is at a position retracted from the first delivery path (a) to the outside of the weighing hopper 7. The guide member 55 prevents the articles discharged by opening the gate 7a from scattering, and correctly guides the delivered articles to the first collecting chute 9.

[Other Embodiments]
The present invention can also be implemented in the following modes.

(1) In the above-described embodiment, the description has been made by applying it to the mixed weighing of various kinds of articles, but the weighing device of the present invention is not limited to the mixed weighing, and for example, the number of stations is reduced to obtain the single type of articles. It may be applied to combination weighing.

(2) The straight feeder 17(C) of another specification can be configured as a multistage straight feeder having three or more stages arranged in cascade.

(3) The straight-advance feeder 17 (C) of another specification can be configured only by the straight-advance feeder having the guide protrusion 22. In this case, the conveying path on the terminal side of the straight feeder is preferably narrow in width so as to guide the articles in a line.

(4) The guide protrusions 22 may be formed in the shape of a vertical wall having the same height in the entire length in the transport direction and a triangular shape in a plan view having a sharp tip at the upstream side in the transport direction.

(5) The position of the guide protrusion 22 is not limited to the center in the width direction of the transport passage, and may be formed at a position deviated from the center. In addition, depending on the type of the article, the guide protrusions 22 may be installed at a plurality of positions in the conveying direction so that the dispersing action is performed a plurality of times.

1A Weighing device 1B Weighing device 4 Weighing unit 5 Article supply section 6 Supply hopper 7 Weighing hopper 8 Memory hopper 15 Storage tank 16 Storage hopper 17 Straight-line feeder 17a Upstream straight-line feeder 17b Downstream straight-line feeder 19a Trough 19b Trough 22 Guide protrusion f h Conveying passage Transport passage

Claims (6)

A straight-line feeder that vibrates a trough to convey articles on the trough,
On the bottom surface of the transfer passage of the article in the trough, a guide protrusion that is gradually increased in the width direction is provided in the middle of the width direction of the transfer passage toward the conveyance direction of the article,
On both sides of the guide protrusion, a conveying passage having a gradually narrowing passage width is formed,
A straight line feeder characterized by that. The guide protrusion is provided on the downstream side in the transport direction of the article, and is gradually raised toward the transport direction.
The straight feeder according to claim 1. Two troughs are provided, an upstream trough and a downstream trough in the transport direction,
The two troughs are vertically arranged in a step-down manner toward the transport direction,
The upstream trough has the guide projection and the transport passage having a gradually narrowed passage width.
The straight feeder according to claim 1. A vibrating mechanism for independently vibrating the two troughs,
The combination weighing device according to claim 3. A plurality of linear feeders according to any one of claims 1 to 4 are provided,
A combination weighing device characterized by the above. A plurality of rectilinear feeders are arranged in a line in a straight line, and a supply hopper to which the articles conveyed by each rectilinear feeder are supplied and a weighing hopper that holds the articles discharged from the supply hopper and weighs the weight of the articles. , A plurality of stations of weighing units having a series in the top and bottom are arranged in a line in a straight line,
The combination weighing device according to claim 5.

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